Machine for constructing concrete pipe



Dec.. 20, 1932. -w SCHULTZ. 1,891,731

MACHINE FOR CONSTRUCTING CONCRETE PIPE Filed March 24, 1950 I F2 9% Z. II 1 I I I I 27 2a I l ea 3.9 30 a l a 5 as I I 11 E4 Q 10 O Q I I y 8///3 J I ll g2 .23 14 62 mi 34. 13 i INVENTOR ATTORN EY Patented Dec.20, 1932 UNITED v STATES PATENT, OFFICE ALFRED W. SCHULTZ, ,OFWATER-LOO, IOWA, ASSIGNOR TO ZEIDLEB CONCRETE PRODUCTS MACHINERYCOMPANY, OF, ST. JOSEPH, MISSOURI MACHINE non oons'rnnc'rrne ooivoanrnPIPE Application filed March 24, 1930. Serial No; 438,486;

My invention relates to improvements in machines for constructingconcrete pipe, and particularly for making bell-end pipe sections ofmixed finer and coarser concrete-materials, and the object of myimprovement is to supply a machine for this purpose available forimparting to the bell end terminations of a concrete pipesection'enhanced resisting hardness where most subject to wear 0 andshock breakage.

This invention also constitutes improvements upon my device for the samepurpose shown and described in my pendin application for United StatesPatent, 289,682, filed July 2, 1928.

I have accomplished the object of this invention by the mechanism whichis herein after described and claimed, and which is illustrated in theaccompanying drawing, in

so which Fig. 1 is a central vertical longitudinal section of a tilemold and of the supports therefor together with the. mechanism withinthe mold for forming a concrete tile, and other and associated mechanismfor imparting to the bell end parts of the mold slight s erial No.

tapping vibrations for the purpose above specified. Fig. 2 is a top planof the rotary table of the vibrating mechanism only.

Minor modifications may be effected in the so mechanisms exemplifiedherein without departing from my invention.

The numeral 23 denotes a substantially cylindrical mold casing the lowerend part 24: H of which is enlarged for the shaping of a tile bell endtherein. Within this lower part 24 is inserted a concentrically spacedannular pallet with raised central hollow part 25 resting upon a flatannular plate 26 which latter closes the bell end part of the mold 23.

so The numeral 27 denotes a rotatable shaft having mounted on its lowerdiminished end 28 a cylindrical former head 32, the latter having asmaller upper extension 31 provided with opposite slotted wings 29 uponwhich 4 are removably secured the curvate and outwardly groovedtroweling bodies which terminate as far outwardly diametrically as theformer head.

The shaft .27, as is well known to those 5 skilled in the art, ismovable to and fro centrallyand longitudinally through the mold 23 bymechanism not shown, and simultaneously while in rotation induced bysaid mechanism. The former head 32 and the connected troweling bodies 30therefore move through 5; and closely spaced from the inner walls of theraised pallet part 25 central opening. Fig.1

shows the positions of these elements when the former head 32 has firstbeen moved downwardly through the mold casing and is about to reverseits direction of longitudinal movement to start up rotatingly throughthe mold, as the flowable mixture of finer and coarser concretematerials is being introduced into the mold at the top for de- 5position in the bell end 24 upon the pallet base plate and pallet. 1

The means for supporting said mold 23 are a basal member 1 upon which isfitted an an nular angle body 2. This body 2 supports a [plurality ofsuperposed progressively diminishing annular plates 4, 6, 8 and 9, ofwhich the uppermost are thicker than those below, the whole thus forminga stepped cone of low height and concentric with the lower part of theformer head 32 when'the latter is in its lowered position. These steppedannular plates are removably supported on said annular rim body 2 andconnected respectively thereto and to each other in turn inwardly so bybolts 3, 5, and 7 the annular plate 8 only having opposite verticalapertures 10 for a purpose tobe described. 1

The former head 32 is continued below by a downwardly forked cylindricalbody 34 '85 mounted removably upon the downwardly projecting andthreaded termination 33 of the V shaft part 28. v

The numeral 21 denotes a hollow bearing apertured with the basal member1 to receive rotatably a short vertical shaft 19 alined with and belowthe shaft part 28. On'the lower end'of the shaft-19 is a nut 22. Uponthe member 1 is a ball-bearing 18 including a depending cylindrical body17 rotatably stepped thereon and forming part of a circular horizontaltable 16.

The upper part of the shaft 19 projects centrally above the table 16 andis receivable into the interspace of the furcations of the body 34, andthe shaft has oppositely projecting parts 20 which engage thefurcations, so that when the shaft 27 is in rotation, the shaft part 19is by said means rotated in the same direction together with said table16. The

table 16 has one or more oblong apertures to be traversed by one or morerollers 141 as the case may be, which have their pintles rotatablymounted in bearing sockets in spaced pairs of depending hangers 15secured upon the under face of the table. The rollers project a slightdistance above the top of the table.

The numeral 12 denotes a pair of like tappets which reciprocatinglytraverse the bearing holes 10 in the annular plate 8. The lower parts ofthe tappets have depending furcations between which are mounted smallerrollers 13 in a diametrical position over the table 16 to ride upon andacross the lower rollers 14 during eachrotation of the table 16. Theupper end parts of the tappet bodies 12 are provided with interiorlythreaded hollowed seats for the headed and threaded pins 11, so that thepins may be adjusted toward and from the platen base plate 26 againstwhich they rise and impinge once during each rotation of the table 16.

The hollow concrete tile is formed within and next to the inner wall ofthe mold 23 and its bell end 24 while the former head 32 is rotating andmoving upwardly through the mold. In Fig. 1 the lower part of the. moldincluding the entire bell end thereof are shown filled with the flowable-miXture of finer and coarser concrete materials, which may be cement,sand, and broken stone in desired proportions. During this operation offorming the tile, the mechanism above described which operates thetappets 11, in rotating the table 16 causes the tappets in succession totap lightly but sufliciently upon the pallet part 26. This causes aseparation of the more fiowable finer cement particles from the coarsermaterials in the bottom part of the bell end 24, as is indicated in Fig.1 by the variations in the sectioning of the concrete in its superposedzones 0, b and a, the bell end termination of the tile being almostpurely cement, which later hardens and is more resistant to wear andblows than the more porous parts of the tile at b and a. The steppedplates are removable.

Having described my invention, what I claim as new, and desire to secureby Letters Patent, is:

1. The combination with a mold and a rotary packer head within it toshape a concrete body from a mixture of flowable finer and coarserconcrete materials, of a rotary table associated with and spaced fromthe basal termination of the mold and having a roller mountedeccentrically relative to the table center, an adjustable sectionaltappet supported in the interspace of the table and said basaltermination and having a roller mounted upon its lower end to rideacross the roller on said table during each rotation of the table tolift the tappet and cause it to tape said basal termination to jar thecontents thereof, causing the settling of the finer cementitiousmaterial below the coarser material of the concrete while the concretebody is being shaped within said mold.

2. The combination with a mold to shape a concrete body from a mixtureof fiowable finer and coarser concrete materials, of a relatively fixedvertically eccentrically apertured supporting plate upon which the basaltermination of the mold is supported in spaced relation, a tappet seatedmovably in the apertureof said plate to impinge at times at its upperend with said basal termination, said tappet being formed of adjustablycon-- nected sections, the lower section being forked with a rollerrotatably mounted between its furcations, and a rotary member below saidtappet having a rotatable roller thereon adapted to ride under thetappet roller once during each rotation of the memher to actuate thetappet in knocking the said basal termination intermittently to vibratethe concrete contents of the latter while the concrete body is beingformed within said mold.

In testimony whereof I a-fliX my si nature.

ALFRED W. SCH LTZ.

